Ensure NotificationCompat.MediaStyle methods return MediaStyle

All other NotificationCompat Styles use a fluent style, returning
this to allow chaining methods together. Ensure that MediaStyle
methods follow the same pattern.

BUG: 21740373
Change-Id: If3c9be7c1c87b10bdb320f97d20eac6c3ffaeb7c
diff --git a/v7/appcompat/api/current.txt b/v7/appcompat/api/current.txt
index 78a0116..cf6bc5c 100644
--- a/v7/appcompat/api/current.txt
+++ b/v7/appcompat/api/current.txt
@@ -292,10 +292,10 @@
   public static class NotificationCompat.MediaStyle extends android.support.v4.app.NotificationCompat.Style {
     ctor public NotificationCompat.MediaStyle();
     ctor public NotificationCompat.MediaStyle(android.support.v4.app.NotificationCompat.Builder);
-    method public void setCancelButtonIntent(android.app.PendingIntent);
+    method public android.support.v7.app.NotificationCompat.MediaStyle setCancelButtonIntent(android.app.PendingIntent);
     method public android.support.v7.app.NotificationCompat.MediaStyle setMediaSession(android.support.v4.media.session.MediaSessionCompat.Token);
     method public android.support.v7.app.NotificationCompat.MediaStyle setShowActionsInCompactView(int...);
-    method public void setShowCancelButton(boolean);
+    method public android.support.v7.app.NotificationCompat.MediaStyle setShowCancelButton(boolean);
   }
 
 }